Tubular lamp



(R0 Model. W. S. HAMM 8?; A. M. DUBURN.

TUBULAR LAMP.

- No. 514,921. Patented Feb. 20, 1894.

UNITED STATES PATENT Ofr IoE,

WILLIAM s. HAMM AND ANTHONY M. DUBURN, OF CHICAGO, ILLINOIS, T

ASSIGNORS TO THE ADAMS & WESTLAKE COMPANY, OF ILLINOIS.

, TUBULAR LAMP.

SPECIFICATION forming part of Letters Patent No. 514,927, dated February 20, 1894. Application filed April 15, 1893. SerialNo. 470,446. (No model.)

To all whom it may concern: I

Be it known thatv we, WILLIAM S. HAnM and ANTHONY M. DUBURN, citizens of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Tubular Lamps, of which the following is a specification, reference being bad to the 2.0-.

. 2o rents supplying the burner.

The prime object of this invention is to.

avoid this difliculty by providing the lamp with means wherebythe production of counter-currents is avoided and the air properly 2 5 directed into the air-ducts in both a cold and partially heated condition.

This invention may be'applied to lamps of any suitable construction and irrespective of any particular kind of burner and its connecting and operating devices, the lamp illustrated in the accompanying drawing being simply a type of the class to which our invention may be best applied.

The primary objects of this invention are 3 5 attained by the devices illustrated in the accompanying drawing, in which is shown a sectional elevation of a lamp embodying our invention.

Similar letters of reference indicate the same parts in the drawing.

, Referring by letter to the accompanying drawing, A designates the globe, B the chimney, G the inductor and E the air-ducts all of which may be of any well known-or de- 5 sired construction.

The chimney B is provided with a depending vertical flange F having an annular series'of slots G therein and an oblique deflecting plate H whereby the products of combus- 50 tion are separated, the inner portion thereof inductor, from whence they pass into the airducts E and thence down to the burner. The upper end of the globe bears against or engages the lower edge of the slotted flange F as shown,so as to form-a practicallyair-tightjoint at that point. Between the slotted flange F and the inductor O is a space or chamber from which lead the air-ducts and into which chamber the cooler, outeratmosphere is taken at the bottom of the inductor and also over the top thereof, as shown, the reflector I being provided with a suitable opening permitting the air immediately surrounding the globe to pass up into the chamber atthe under side 'of the inductor. The inductor is provided with an oblique inwardly and downwardly extending flange J which extends nearly to the chimney B, and immediately above the inductor is located a flaring shield or collar K having the general shape of. an inverted truncated cone, the lower and smaller end of which terminates immediately above the inductor and is of less diameter than that of the top of the inductor, but preferably not less than the diameter across the lower edgeof the oblique flange J. This flaring shield or collar may be supported from the inductor by the arms L, or if desired, it may be attached directly to the roof of the car. This shield or collar K directs a ourrentof air downwardly into the inductor over the oblique flange thereof, which current being met by the upward current from the under side of the inductor, unites therewith and passes from the chamber between the inductor and the chimney go into the air-ducts and thence down to the lamp. With this construction sudden or strong gusts of wind are rendered harmless to the lamp, for they cannot pass directly into the globe, but on the contrary, are so deflected 9 a and directed that they can only pass-into the k air-ducts through which their passage is sufficiently tortuous to render them harmless to the flame.

Having described our invention, what we 10o doctor and an outwardly flaring or conical shield above and external to said inductor, substantially as and for the purpose described.

3. In a lamp the combination with the inductor O, flange J, and the air-ducts E leading therefrom, of the chimney B, having the deflector II and the perforated flange F, and the flaring or conical shield K, substantially as and for the purpose described.

WILLIAM S. HAMM. ANTHONY M. DUBURN. Witnesses:

WARD W. WILLETS, FRED B. JONES. 

